基于BP算法和时变基线的机载InSAR数据处理方法研究

Processing of the Airborne InSAR Data Based on the BP Algorithm and the Time-varying Baseline

该文首先系统分析了传统机载InSAR数据处理方法由于波束中心近似和地形高程未知导致的相位误差问题,以及该相位误差对成像质量和高程精度造成的影响。其次,提出了基于BP算法和时变基线的机载InSAR数据处理方法,解决了波束中心近似带来的问题,并通过时变基线的干涉处理方法减小了地形高程未知导致的高程误差。最后,通过仿真分析验证了该方法的有效性。

A systematic review of the phase error of the conventional airborne InSAR data processing method is firstly presented, which is caused by the center-beam approximation, and the unknown terrain, and its effects on imaging quality and height accuracy are analyzed as well. Then, a novel airborne InSAR data processing method based on the BP algorithm and the time-varying baseline is proposed for addressing the center-beam approximation problem and reducing the height error due to the unknown terrain which have been both accomplished. Finally, the validity of the proposed method is testified by the simulation experiments.